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Year-to-year reoutcropping of eighteen degree water in an eddy-resolving ocean simulation

Publication ,  Journal Article
Kwon, YO; Park, JJ; Gary, SF; Susan Lozier, M
Published in: Journal of Physical Oceanography
January 1, 2015

Winter outcropping of the Eighteen Degree Water (EDW) and its subsequent dispersion are studied using a 1/12 ° eddy-resolving simulation of the Family of Linked Atlantic Modeling Experiments (FLAME). Outcropped EDW columns in the model simulations are detected in each winter from 1990 to 1999, and particles are deployed in the center of each outcropped EDW column. Subsequently, the trajectories of these particles are calculated for the following 5 yr. The particles slowly spread away from the outcropping region into the nonoutcropping/subducted EDW region south of ~30°N and eventually to the non-EDW region in the greater subtropical gyre. Approximately 30% of the particles are found in non-EDW waters 1 yr after deployment; after 5 yr, only 25% of the particles are found within EDW. The reoutcropping time is defined as the number of years between when a particle is originally deployed in an outcropping EDW column and when that particle is next found in an outcropping EDW column. Of the particles, 66% are found to reoutcrop as EDW in 1 yr, and less than 5% of the particles outcrop in each of the subsequent 4 yr. While the individual trajectories exhibit significant eddy-like motions, the time scale of reoutcropping is primarily set by the mean circulation. The dominance of reoutcropping in 1 yr suggests that EDW outcropping contributes considerably to the persistence of surface temperature anomalies from one winter to the next, that is, the reemergence of winter sea surface temperature anomalies.

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Published In

Journal of Physical Oceanography

DOI

EISSN

1520-0485

ISSN

0022-3670

Publication Date

January 1, 2015

Volume

45

Issue

4

Start / End Page

1189 / 1204

Related Subject Headings

  • Oceanography
  • 4015 Maritime engineering
  • 3708 Oceanography
  • 0911 Maritime Engineering
  • 0405 Oceanography
 

Citation

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ICMJE
MLA
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Kwon, Y. O., Park, J. J., Gary, S. F., & Susan Lozier, M. (2015). Year-to-year reoutcropping of eighteen degree water in an eddy-resolving ocean simulation. Journal of Physical Oceanography, 45(4), 1189–1204. https://doi.org/10.1175/JPO-D-14-0122.1
Kwon, Y. O., J. J. Park, S. F. Gary, and M. Susan Lozier. “Year-to-year reoutcropping of eighteen degree water in an eddy-resolving ocean simulation.” Journal of Physical Oceanography 45, no. 4 (January 1, 2015): 1189–1204. https://doi.org/10.1175/JPO-D-14-0122.1.
Kwon YO, Park JJ, Gary SF, Susan Lozier M. Year-to-year reoutcropping of eighteen degree water in an eddy-resolving ocean simulation. Journal of Physical Oceanography. 2015 Jan 1;45(4):1189–204.
Kwon, Y. O., et al. “Year-to-year reoutcropping of eighteen degree water in an eddy-resolving ocean simulation.” Journal of Physical Oceanography, vol. 45, no. 4, Jan. 2015, pp. 1189–204. Scopus, doi:10.1175/JPO-D-14-0122.1.
Kwon YO, Park JJ, Gary SF, Susan Lozier M. Year-to-year reoutcropping of eighteen degree water in an eddy-resolving ocean simulation. Journal of Physical Oceanography. 2015 Jan 1;45(4):1189–1204.

Published In

Journal of Physical Oceanography

DOI

EISSN

1520-0485

ISSN

0022-3670

Publication Date

January 1, 2015

Volume

45

Issue

4

Start / End Page

1189 / 1204

Related Subject Headings

  • Oceanography
  • 4015 Maritime engineering
  • 3708 Oceanography
  • 0911 Maritime Engineering
  • 0405 Oceanography